believe it or not, I used to work on a ranch....castrating young bulls....it was very rudimentary and all we had were two house bricks that we held one in each hand and placed either side of the beasts er, how can I be polite here,...."dangly bits" !...Then, in one swift movement, bring the bricks crashing together! A friend once asked me "Hell, doesn't that hurt?" I replied : "Only if you catch your thumbs!"...